Flaky near cache test [API-2275]

[yuce]

This test failed in the compatibility suite for Hz 5.3.8:
https://github.com/hazelcast/client-compatibility-suites/actions/runs/15042583719/job/42277600444

=================================== FAILURES ===================================
______________________ MapTest.test_invalidate_single_key ______________________

self = <tests.integration.backward_compatible.proxy.map_nearcache_test.MapTest testMethod=test_invalidate_single_key>

    def test_invalidate_single_key(self):
        self.fill_map_and_near_cache(10)
        initial_cache_size = len(self.map._wrapped._near_cache)
        script = """map = instance_0.getMap("{}");map.remove("key-5")""".format(self.map.name)
        response = self.rc.executeOnController(self.cluster.id, script, Lang.PYTHON)
        self.assertTrue(response.success)
        self.assertEqual(initial_cache_size, 10)
    
        def assertion():
            self.assertEqual(len(self.map._wrapped._near_cache), 9)
    
>       self.assertTrueEventually(assertion)

tests/integration/backward_compatible/proxy/map_nearcache_test.py:77: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
tests/base.py:76: in assertTrueEventually
    raise last_exception
tests/base.py:67: in assertTrueEventually
    assertion()
tests/integration/backward_compatible/proxy/map_nearcache_test.py:75: in assertion
    self.assertEqual(len(self.map._wrapped._near_cache), 9)
E   AssertionError: 10 != 9
=========================== short test summary info ============================
FAILED tests/integration/backward_compatible/proxy/map_nearcache_test.py::MapTest::test_invalidate_single_key
============ 1 failed, [142](https://github.com/hazelcast/client-compatibility-suites/actions/runs/15042583719/job/42277600444#step:15:143)1 passed, 32 skipped in 446.89s (0:07:26) ============

[github-actions]

Internal Jira issue: API-2275